Jack



Dec. 25, 1928. 1,696,865

1 N.c.scHELLENGER JACK Filed Feb. 21, 1925 3 Sheets-Sheet l j@ 60 Ziyi/@Mm JP/ma,

Dec, 25, 192s. 1,696,865

N. QSCHELLENGER l JACK Filed Feb. 21, 1925 s sheets-shed 2 Dec. 25, 1928. l 1,696,865 v4 N. C. SCHELLENGER JACK l x Filed Feb. 21, 1925 5 Sheets-Sheet 5 @j ma@ Patented 2 5,

f UNIT-En STATES,

NEWTON c. scHELLnNGER, orELxHAn'r, INDIANA, AssmNoB. Iro cn'IcAGo TELE-- PHONE SUPPLY COMPANY, 0F ELKHART, lI1\1' ])1'1\`|'A,.A. COBPORATIOIYOF DELA- `My'invention relates jacks` for telephony,

` radio, and the like'.

Whilethe jack of my invention is particularly adapted for a connecting member on the end of a cord or the like, commonly called a mounted jack, it is to be understood that the invention is not limited to an individually or vseparately housed jack, but may be ap plied generally to jacks mounted on panels. switch oards, or in strips, or the like. 'According to the preferred form of my 1nvention, I provide two generally parallel springswhich are connected at their front ends to a common thimble or body member, this maybe astrip panel or the like, if desired, and at their rear ends they are connected together for the'dual purpose. of increasing the strength of the springs and for supporting suitable terminals.

which is inserted through the thimble, panel, strip, or the like, is engaged by intermediate portions of these springs which intermediate portions are bent down to 'eo-operate with the tip and sleeve portions of .the plug.v If

more than two contacts, i. e., tip and sleeve,\

* are desired,y that is for example, if a ring `contact is to be employedonthe plug; an'additional spring may be ymounted in a. similar manner and connected at its front to.I they body,.panel, strip, or the klike, and at its rear vto the connecting member, or it may befree at its front end and mounted upon the "connecting block or frame'at its rear only. In

fact, injone form of my invention disclosed herein the springs mayall be free at their front ends and secured-to the block o r fra-me at itheir'rear only. Where the jack is, sepa# v rately mounted, a protecting sleeve or housing of insulatingmaterial is mounted on the.

thimble andit provides yan opening through vwhich the conductors connected to the springs ma "project: IN

" f lindthat with theuse of springs connect ed at both ends and employing lonly the con- Y tacting ntermediate'portwns a very light spring is permissible; and yet Iexcellent contact and relatively .contact pressure may be f nmaeyai. member between ,the rear end 0f the spxiiirxgs-A erably the connecting The plug JACK.

l e Applioationled'l'ebruary 2'1, 1925. Serial No. 10,726. v

is a block of insulating material to which the' springs are connected, so that the spring structure really forms a truss withinv itself.

This may be varied by employing a hollow attach the ends of thesprings to the block may serve also as terminal means.

I have shown in the accompanying drawings a number of ways in which my invention may be embodied in order that those skilled in the art maybe advised how to construct and operate an. embodiment of my invention;

In the drawings: Flgure 1 is a longitudinal section showing bodimentfof my invention Fig. 2 is an axial longitudinal section taken at right'angles to the view of Fig. 1;

Fig. 3 is a view like Fig. 2 of a modifica- -tion l Fig.- 3A is a cross section of'a modification e the spring structure in elevation of an emof Fig. 3 showing a. different wayof attach-` ing the front ends of' the springs;

line 4--4 of Fig. 3;

Fig.'l is a transverse Vsection like Fig.. 4

v showing a modification of the manner of-conthe outer ends of the springsftA similar view of a` vfurther `modisheet metalthimble or hollow rivet, so that .the jack may be vmounted upon a panel by means of lthe usual jack'thim le and nut;

Fig. 8 is a top planview of a modified form of jack embodying my invention; e

Fig. 9 is a vertical axial section-ofthe device shown in. Fig. '8; l

7 is anexploded view of a modified Fig. 10 'is asimilar section-.ofy a'modification; Y

line 11--11 'of Fig.'9;

v Fig. 11 is a transverse-section taken on the.

. 75,V Fig. lis a transverse section taken on'the fled form of j ack in which a sleeve of insulation is employed "for mounting the jack springs;

Fig. 13 is a. cross section of the same taken on line 13-13 of Fig. 12.;

Fig. 14 is a top plan view of the sleeve and springs employed in the structure of Figs. 12 and 13;

Fig.` is a longitudinal section of a modified form of mounted j ack in which the ack springs are mounted upon a connecting member which is held inside the mounting' shell by a pair of braces or strips; and

Fig. 16 is a cross section of the device shown in Figfl, line 16-16. i c

As shown in Figs. 1 and 2, the mounted jack 1 is connected atthe end of the flexible conducting cord 2 and is adapted to co-oper- Y ate with the plug member 3. The plug com- Aprises a stud having two electrical contacts,

namely, the sleeve member 4 and the tipmember 5, the construction of which is well known to those skilled in the art. The jack member 1 comprises a metallic thimble 6, shown in Figs. 1 and 2, having a knurled portion 7 andv a threaded portion 8 by which the sleeve or shell 9 may cnveniently be secured to said thimble member 6. The thimble 6 has a reduced neck 10 extending rearwardly thereof and upon this neck are mounted the eye portions Aor' the two springs 11 and 12. Y These eye portions are bent at right angles to the main parts of the springs 11 and 12 and embrace the neck 10 of the thimble 6. The spring 11 is grounded upon this neck 10 and the eye of the spring 12 is insulated therefrom by insulating washers 13 upon each side there of and an insulating ring 14 lying radially between the edge of the eye and the surface of `the neck or sleeve 10.' The.end of the neck or sleeve 1() is seated over the adjacent washer 13 to form `a suitable head, the parts beingy then held together by friction. The springs 11 and 12 have bent portions or humps 1 5 and 16, respectively, for engaging the sleeve and tip contacts 4 and 5, respectively, of the stud `portion of the plug. At their rear ends just' '18 and 19, these rivets being headed over as indicated in Fig. 2 to secure the blocki 17 {irmly to the springs 11 and12. The inner ends of these hollow rivets are insertedin the interior of the block 17 .Y If desired, screws may -be threaded into the block 17 in place of the rivets 18 and 19. y

` In the yform shown in Figs. 1 and 2 the springs 11 and 12 extend rearwardly and are doubled upon themselves to form terminal portions 20, suitable clamping screws 21 being provided for clamping the tips of the conductors 22 and 23 of the cord 2. If desired, the bolts 21 may be passed loosely through the springs 11 and12 and may be held by nuts lying onthe inside of, these springs 11 and 12.

In the embodiment shown in Figs. 3 and 4, the springs 24 and 25 corresponding to the springs 11 and 12 are connected at their front ends by the rivets 26 and 27, which are embedded in the thimble member 2S, which in this case is made of insulating material. Screws may be employed instead of the rivets 26 and 27 and if desired the springs 24 and 25at their forward ends may have lateral expansion as indicated atFig. 3A, so that rivets or screws 29 and 30 may be secured at the sides of the springs 24 and 25 instead of directly between them, as illustrated in Fig. 3.

In the form shown in Figs. 3 and 4 the springs 24 and 25 are connected'to the block 17 at their rear ends, the springs terminating at said block and separate angular clips 31 being riveted to said springs through the rivets 32 embedded in the block-17, so that in eliect the springs extend oil' laterally. These angular clips 31 are provided at4v their outer extending ears, as shown at 34 in Fig. 6, suitable terminal screws 35 passing through these cars and into the block 36, this block 36 corresponding to the connecting member 17 1n the foregoing ligure.

In this construction the screws 35 are offset with respect to each other so that they may be made amply llong to secure a good hold on the block 36 and also to serve ,as clamping means for the terminals of the connecting` conductors.

lIn Fig; 5 I have shown the outer ends of i the lsprings 24 and 25 as carried on the inside of a ring 26 of insulating material, pre-fen ably apiece of fiber tubing, suitable clamping screws 38 and 39 passing through the ring 37 and into the springs 24 and being adapted to clamp, either between the springs and the ring 37 or under the heads of the screws 38the terminals of the conductors to which the springs are connected. f

In Fig. 7 `I have shown the springs 11 and 12 such as shown in Fig. 1 as connected together by a sheet metal thimble 40 so as to hold the front ends of these springs together in insulated relation for mounting of the-jack upon a panel or the like. The eye ends at the forward parts of the springs 11 and 12 are separated by a suitable insulating-washer 41 and are held out of contact with the'metal thimble 40 by a sleeve 42 and outer washers 43. The usual jack thimble 44 is passedV through the sheet metal thimble or hollow rivet 40 and is adapted to co-operate with the c n threaded at its forward end-to the thimble nut 45, so that the jack of Fig. 7 may be npunted upon a switchboardpanel, or'the In Figs. 8 and 9- I have shown a modification in which the mai springs. 46 and 47 have outwardly turnedxioot portions 48 `and 49 riveted by means of the hollow rivets 50 to a ring of insulatin ,material 51 which lies upon the backside o the panel board 52 and is clamped by means ofthe usual threaded thimble 53.-

At the rear end the springs 46 and 47 are connected to acommonconnecting member l54 as by means of the pairs of rivets 55 and 56, these rivets holding alsoco-operatin contact'springs 57l and 58 in insulated re ation- Q upon the block 54,.so that insertion of the lplug 3, in addition to making contact with the-springs 46 and 47, 'closes contact between 'springs'46 and 57 and 47 and 58, respectively;

Obviously the contacts may be opened instead of closed as indicated, for example, in Fig. 10. i Any combination of opening and closing may be made in a usual and well known manner. 'In the structure of Fig. 10 the springs4 46 and 47 have co-operating contact springs 57 and 58" lying between them Aand the cir- I cuits between springs 46 and`47 and-between thesprings 47 and 58 are opened by the insertion of the plug member 3. Otherwise the construction and mode of operation is the same as shown in Fig. 9. f

In the modification shown in Figs. 12, 13

and 14, I employ a sleeve of insulating material 60 upon which the springs 61 and 62 are -mounted, these springs having contact portions 63 and 64 extending inwardly. and be ving attached ,at their forward and at their rear positions inside of the sleeve 60, as by means of the rivet 65. At their rear. the

springs 61 and 62 have extensions beyond the .point of attachment to the sleeve 60 for formf ing terminal portions 66 and'67, these termi-l na portions having suitable clamping screws 68. and 69`for clamping the conductors of a i cord, or the like.

Vtending flange 73 having an aperture 'This'. sleeve of insulatingmaterial 60, with the'springs'61 and 62 andv their terminals suitably mounted as a unit, is .inserted inside of an outer shell ofl insulation 70' which is between the thimble 71;,rand the inturned iange 73 "when the shell 7 0 isthreaded upon Theoperation o this embodiment will be apparent l from the :foregoing descriptionj The jack is inserted in the opening 72 and th'e contact vportions of the jack/engage the humps63 and 64 and makefirm contact with the same. 'Y

The sleeve 60 ofinsulating'material may be cut out intermediate the ends of the springs 61 and 62, if desired, as shown in the drawings, but this is optional. Preferably, the sleeve 60 vfits snugly in the shell 70'.

In the embodiment shown in Figures 15 and 16, the jack comprises a pair of springs 75 and 76 which areconnected at their rear ends by means of the connecting member 77, which in this case is a block of insulating material. The rear ends of the springs are preferably secured to this block as by means of the screws 78. Lateral extensions of the ends of the springs tear the contact springs i 79 for connecting to the conductors of a cord, vor the like.

screws 78 so as to ive two points of attachment for the sprmgsto the block 77 to strengthen the N connection between the The clamping screws 79 are 'preferably placed back of the clampingsprings and the block. The rear ends of'.

the springs 75 and 76 are osetlwith respect to eachother as is clear'from Fig. 16, so thang the screws l78 uand 7 9- may take firm hold in the block 77 without danger of short circuiting the connection.

The block 77 is mounted inside of the shell 8O by means of two strips or braces 81 and 82 which in turn are astenedto the edges of the block 77 as by means of suitable screws. These braces or strips 81 and 82 vare of a length vsuch .as to fit nicel` between the flange 83 .at the rear endof t e shell 80 and thev 'thimble 84 to which the front end of the` shell 80 is threaded. I

I do not intend `to be limited to thedetails shown or described.

I claim:

1.l In a jack of the character described, the

combination of a body'having an opening springs'are attached for maintaining spaced relation vbetween said springs.

therein, a pair of springs secured `at their 2. In ajack, a body having' an opening for guiding a plug member, a pair of springs connected to'said body at their forward ends, said springs. being bent .in their intermediate` portion to engage the contacts of a plug, and

an insulating memberto which. said springs are attached at theirfrear ends for maintaining spaced relations between said springs. 3. In a jack, a tubula-r member adapted to receive a plug, a pair'of spaced springs extending outwardly rom said member, being firmly connected at one end to said member, a rigld insulating vmember'sto which the other end of said springs are attached for holding said other ends in spaced relation, and a shell connected to said tubular member forenclosing said springs, said springs having intermediete portions adapted to be engaged by the and being bent intermediate of their ends, Contacts of a cooperating plug. Aand a body member having an opening for 10 4. In a jack of the vcharacter described, a vguiding a plug member to connect with the pair of Contact springs insulated from each bent portion of said springs. f 5 other and secured attheir" front and rear In Witness whereof, I hereunto subscribe endsl in fixed relationship with respect to one my name this 18th day of February, 1925. another, said springs extending longitudinaL 1y from the front tothe rear of the jack- NEWTON C.y SCHELLENGER. 

